logo

korean english

게시판

Home > 게시판 > 세미나

○ Date : 2015년 10월 20일(화) 오후 4:00 ~ 5:00

○ Place :  삼성학술도서관 2층 정보교육실

○ Speaker : Prof. T. Tamegai (The University of Tokyo)

○ Topic : Electromagnetic Response and Thermomagnetic Instabilities in Three-Dimensional Nanostructured Superconductors


Abstract:

Electromagnetic response of three-dimensional nanostructured superconductors are studied by using magneto-optical (MO) imaging method. In this talk, I will introduce two recent studies on three-dimensional nanostructured superconductors. The first topic is on the flux penetration and critical state in simple three-dimensional superconducting structures, such as orthogonal strips (crosses) and stacks of squares and rectangles. The critical state field profile is not a simple superposition of critical states in the two layers. Instead, flux penetration in one layer strongly modifies that of another layer. The second topic is on one of the simplest three-dimensional structures consisting of arrays of strips, where multiple layers of two-dimensional strip arrays are stacked with some shift between the neighboring layers [1-4]. We call these three-dimensional nanostructures “shifted strip arrays (SSAs)”. In SSAs, flux avalanches are observed when the overlap between layers is large even if the width of each strip is well below the threshold value. Various forms of avalanches either perpendicular or parallel to the strip are observed in SSAs when the overlap is large. How the number of layers up to six and other parameters affect the shape and behavior of flux avalanches in SSAs will be discussed.
[1] Y. Tsuchiya, Y. Mawatari, J. Ibuka, S. Tada, S. Pyon, S. Nagasawa, M. Hidaka, M. Maezawa, and T. Tamegai, Supercond. Sci. Technol. 26, 095004 (2013).
[2] T. Tamegai, Y. Tsuchiya, S. Tada, J. Ibuka, A. Mine, S. Pyon, Y. Mawatari, S. Nagasawa, M. Hidaka, and M. Maezawa, Physica C503, 62 (2014).
[3] S. Tada, Y. Tsuchiya, A. Mine, S. Pyon, T. Tamegai, S. Nagasawa, and M. Hidaka, Physics Procedia 58, 126 (2014).
[4] A. Mine, Y. Tsuchiya, S. Miyano, S. Pyon, T. Tamegai, S. Nagasawa, and M. Hidaka, to be published in Physica C (2015).

번호 제목 날짜 조회 수
공지 <12/8(Thu.) 11:00am>노벨상 소개 강연 - 2016년 노벨 물리학상: 위상 응집 물리의 탄생 2016.11.28 1078572
445 <11/7> On-Film Formation of Bi Nanowires with Extraordinary Electron Mobility 2008.11.03 169673
444 <11/14> 한방의료기기에서 나노소자의 활용 2008.11.11 76017
443 <11/21>Super B factory @ KEK 2008.11.19 77827
442 <11/28> 건국 100주년을 대비하는 과학청년의 자세 2008.11.25 80359
441 <12/5> Fluerenes with diversed structures and their applications 2008.12.02 172148
440 <12/12> 나노물리학과 컴퓨터 시뮬레이션 2008.12.08 75745
439 <3/13> Probing hidden magnetism and quantum criticality in unconventional superconductors 2009.03.06 181885
438 THINKING PHYSICS 발표회 2009.03.16 74790
437 <3/27>Social Experience, Brain, and Behavior 2009.03.23 130907
436 <4/3>Enhanced emission rate from a single quantum well using surface plasmon 2009.03.31 89512
435 <4/10> Holographic Nucleons: In Search of a String Theoretical Solution to QCD 2009.04.06 79177
434 <4/17>고온초전도 2세대 선재 : 현황 및 전망 2009.05.06 77586
433 <5/1>In vivo optical imaging of hemodynamic changes 2009.05.06 125747
432 <5/8>Recent trend of thin film battery 2009.05.06 87526
431 <5/15>강상관 전자계의 열전변환 응용 2009.05.08 77171
430 <5/22> Semiconductor Nanomaterials for Unusual Format Electronics 2009.05.18 153490
429 <5/29> Nanomaterials Work at NASA-Johnson Space Center 2009.05.25 128011
428 <6/5>Magnetism and Superconductivity 2009.05.27 92286
427 <9/11> Complex networks in technology, biology and sociology 2009.09.04 110765
426 <9/18> 생체계에서의 협동현상: 박테리아 수영에서부터 고분자 수송현상까지 2009.09.14 94818